fix: 조회 버튼 클릭 시 주문량도 갱신

backend/templates/admin_rx_usage.html

@@ -778,7 +778,7 @@
                     <option value="amount_desc">금액 높은순</option>
                 </select>
             </div>
-            <button class="search-btn" onclick="loadUsageData()">🔍 조회</button>
+            <button class="search-btn" onclick="loadUsageData(); loadOrderData();">🔍 조회</button>
             <button class="search-btn" style="background: linear-gradient(135deg, #a855f7, #7c3aed);" onclick="openBalanceModal()">💰 도매상 잔고</button>
         </div>